Engineering – Reservoir Engineer / Advisor III at ABNL Limited

ABNL Limited is recruiting qualified and experienced professionals for the position of Reservoir Engineer / Advisor III in Lagos, Nigeria. This is a contract opportunity for experienced reservoir engineering professionals with extensive knowledge of reservoir simulation, field development planning, production optimization, and oil and gas reserves management.

The successful candidate will contribute to improving hydrocarbon recovery, optimizing production, supporting field development decisions, and mentoring junior reservoir engineers working with Seplat’s subsurface teams.

If you have substantial reservoir engineering experience in an operating company and the technical expertise to support complex oil and gas development projects, this opportunity may be suitable for you.

Job Overview

• Job Title: Engineering – Reservoir Engineer / Advisor III
• Company: ABNL Limited
• Work Location: Seplat House, Lagos, Nigeria
• Employment Type: Contract
• Experience Required: 8–12 years of relevant experience, including at least 8 years of reservoir engineering experience in an operating company
• Industry: Oil and Gas, Reservoir Engineering, and Exploration and Production
• Application Closing Date: 4th November, 2026
• Application Method: Email
• Required CV Format: Microsoft Word

About the Company

ABNL Limited is an indigenous Nigerian oil and gas servicing company incorporated in 1992. The company provides professional engineering and technical services to oil and gas exploration and production companies in Nigeria and the West African sub-region.

Since its establishment, ABNL has expanded its operations while maintaining its focus on the oil and gas industry. The company is supported by directors with experience in oil and gas, banking, and finance.

Through its technical services and industry experience, ABNL contributes to supporting the activities of companies involved in oil and gas exploration and production.

Job Summary

ABNL Limited is seeking an experienced Reservoir Engineer / Advisor III to support reservoir management, field development planning, production optimization, and reserves evaluation activities associated with Seplat’s operations.

The successful candidate will work with integrated subsurface and asset development teams to conduct reservoir engineering studies, develop numerical simulation models, evaluate development options, and identify opportunities to improve oil and gas recovery.

The role also involves reservoir surveillance, production forecasting, reserves coordination, technical evaluations, and mentoring less experienced engineers.

The position requires a broad understanding of reservoir engineering disciplines and the ability to work collaboratively with well engineering, production, facilities, and other technical teams.

Key Responsibilities

The Reservoir Engineer / Advisor III will be responsible for the following duties:

1. Reservoir Engineering and Field Development

• Participate in integrated studies and asset development planning to support effective field development decisions.
• Provide reservoir engineering input for field development plans and integrated field studies.
• Conduct dynamic modeling, well and reservoir performance reviews, development options evaluation, and economic assessments.
• Build and maintain numerical reservoir simulation models to support reservoir management and development planning.
• Evaluate alternative field development strategies and recommend appropriate recovery methods.
• Adjust reservoir development plans in response to changes in well performance and reservoir behavior.

2. Reservoir Surveillance and Production Optimization

• Direct and supervise reservoir surveillance activities, including Maximum Efficient Rate (MER) monitoring and bottom-hole pressure (BHP) analysis.
• Evaluate reservoir behavior and predict the performance of assigned reservoirs or fields.
• Monitor production from existing fields and analyse relevant operational and reservoir data.
• Identify opportunities to maximize production and improve hydrocarbon recovery.
• Conduct well test design and interpretation, material balance modeling, and performance modeling for vertical and horizontal wells.
• Recommend suitable production monitoring methods and evaluate the results of production tests.

3. Reservoir Simulation and Recovery Enhancement

• Conduct conventional reservoir engineering and simulation studies to identify optimum recovery and field development options.
• Apply knowledge of enhanced recovery methods, including water flooding, gas injection, and gas lift.
• Evaluate reservoir performance and recommend measures to improve recovery efficiency.
• Conduct and document field reviews and prepare proposals for further development.
• Apply analytical reservoir modeling techniques, including material balance analysis, decline curve analysis (DCA), and pressure transient analysis (PTA).
• Support reservoir fluid property modeling, pressure analysis, fluid sampling, and core analysis activities.

4. Reserves Evaluation and Production Forecasting

• Estimate oil and gas resources through annual reserves evaluation, classification, and booking.
• Prepare documentation for reserves reporting, including the Annual Review of Petroleum Reserves (ARPR).
• Develop medium- and long-term production forecasts for asset budgeting and business planning.
• Coordinate input from field teams on wells, facilities, and production plans.
• Support reserves management and hydrocarbon resource maturation.
• Contribute to business planning and the evaluation of new development opportunities.

5. Technical Coordination and Study Management

• Help define the scope and content of reservoir studies required to evaluate well behavior and optimum recovery methods.
• Prepare programme specifications and review available technical resources.
• Prepare tender documents, evaluate bids, and monitor study team performance.
• Manage contracts relating to bottom-hole pressure services, well testing, and software.
• Conduct technical and commercial evaluations, define contract scope, and obtain the required approvals.
• Monitor contract performance and ensure that agreed technical requirements are met.
• Coordinate with internal teams, consultants, service providers, and third-party contractors.

6. Coaching and Mentorship

• Coach and mentor junior reservoir engineers and other less experienced engineers.
• Share technical knowledge, engineering best practices, and lessons learned from projects.
• Provide guidance on reservoir modeling, surveillance, field development planning, and reserves management.
• Support competency development within the subsurface engineering teams.
• Help maintain high technical standards and promote continuous professional development.

7. Health, Safety, and Environmental Compliance

• Understand and comply with the company’s health, safety, and environmental policies, procedures, regulations, and objectives.
• Promote a proactive safety culture and support the company’s Goal Zero initiatives.
• Demonstrate commitment to effective health, safety, and environmental management.
• Participate in emergency response activities when required.
• Conduct or support accident investigations and follow up on corrective actions.
• Ensure that well management and completion activities appropriately consider health, safety, and environmental requirements.

Requirements and Qualifications

Interested applicants should meet the following requirements:

• Possess a university degree in Engineering or an equivalent qualification.
• Have 8–12 years of relevant experience, including a minimum of eight years of reservoir engineering experience in an operating company.
• Demonstrate broad knowledge of reservoir engineering and other exploration and production disciplines.
• Have practical experience in reservoir simulation model construction and dynamic modeling workflows.
• Understand the quality control processes involved in progressing from an earth model to a dynamic reservoir model.
• Possess strong analytical reservoir modeling skills, including material balance analysis, decline curve analysis, pressure transient analysis, and bottom-hole pressure interpretation.
• Have experience in reserves calculation, evaluation, classification, and reporting.
• Demonstrate knowledge of well modeling, well performance, and production system optimization.
• Have experience with water flooding and gas injection management.
• Possess strong reservoir and well surveillance skills, including data acquisition, analysis, and interpretation.
• Understand well planning and execution within multidisciplinary teams.
• Have knowledge of well delivery operations and well evaluation.
• Understand field development planning and coordination.
• Possess knowledge of production operations and HSE considerations in well management and completion activities.
• Have a working knowledge of economic evaluation, risk assessment, and long-range planning.
• Demonstrate coaching and mentoring abilities.
• Possess very good English language skills.

Essential Technical Competencies

Candidates should be able to demonstrate competence in the following areas:

• Reservoir engineering data acquisition and management
• Reservoir simulation and dynamic modeling
• Analytical reservoir modeling
• Reserves evaluation and classification
• Well modeling and performance analysis
• Production system optimization
• Waterflooding and gas injection management
• Reservoir surveillance and pressure analysis
• Well planning and execution
• Field development planning
• Production forecasting
• Economic evaluation and risk assessment
• Technical study management
• Coaching and mentoring

Applicants should ensure that their CV clearly demonstrates their reservoir engineering experience, technical expertise, and contributions to field development and production optimization projects.

Why Consider This Job?

The Reservoir Engineer / Advisor III position offers an opportunity for experienced oil and gas professionals to contribute to important reservoir management and field development activities.

Here are some reasons to consider this opportunity:

1. Work on Complex Reservoir Engineering Studies: Apply advanced reservoir engineering knowledge to simulation modeling, field development planning, and recovery optimization.

2. Contribute to Production Improvement: Identify opportunities to improve oil and gas recovery and support more efficient reservoir management.

3. Support Reserves Growth: Participate in reserves evaluation, production forecasting, and hydrocarbon resource maturation.

4. Collaborate with Multidisciplinary Teams: Work with subsurface, production, well engineering, and facilities teams to develop practical technical solutions.

5. Develop Leadership Skills: Coach junior engineers, share best practices, and support technical competency development.

6. Apply Commercial and Technical Expertise: Contribute to economic evaluations, development planning, contract management, and long-term production strategies.

Note: The vacancy announcement does not specify the salary, contract duration, or additional employee benefits.

How to Apply

Interested and qualified candidates should send their CV in Microsoft Word format to the recruitment email address below.

Email: jobs@abnl.net

Email Subject: Engineering – Reservoir Engineer / Advisor III

Applicants should use the advertised job title as the subject of their email and ensure that their CV clearly demonstrates their relevant reservoir engineering experience.

Before submitting your application, highlight your experience in reservoir simulation, production optimization, reserves evaluation, field development planning, and reservoir surveillance.

Application Closing Date: 4th November, 2026.

Candidates are encouraged to submit their applications before the deadline.

Frequently Asked Questions (FAQs)

1. What position is ABNL Limited recruiting for?

ABNL Limited is recruiting for the position of Engineering – Reservoir Engineer / Advisor III.

2. Where is the job located?

The position is based at Seplat House in Lagos, Nigeria.

3. What is the employment type?

The vacancy is for a contract position.

4. How many years of experience are required?

Applicants should have 8–12 years of relevant experience, including at least eight years of reservoir engineering experience in an operating company.

5. What academic qualification is required?

Candidates should possess a university degree in Engineering or an equivalent qualification.

6. What technical skills are important for this position?

Important skills include reservoir simulation, dynamic modeling, reserves evaluation, well performance analysis, production optimization, reservoir surveillance, and field development planning.

7. Will the successful candidate be responsible for mentoring junior engineers?

Yes. Coaching, mentoring, and sharing technical best practices with junior reservoir engineers are important responsibilities of the role.

8. What CV format should applicants use?

Applicants are required to submit their CV in Microsoft Word format.

9. How do I apply for the vacancy?

Send your CV to jobs@abnl.net using the advertised job title as the email subject.

10. What is the application deadline?

The application closing date is 4th November, 2026.

CV Tip

For this senior reservoir engineering position, your CV should demonstrate substantial technical experience and measurable contributions to reservoir development and production improvement.

Highlight your experience in reservoir simulation, dynamic modeling, material balance analysis, well testing, pressure transient analysis, reserves evaluation, and production forecasting.

Include relevant examples of your involvement in field development plans, water flooding, gas injection, production optimization, and reservoir surveillance. Where appropriate, explain how your technical work supported better recovery, improved production performance, or informed development decisions.

Because this is a senior role, include evidence of your ability to mentor junior engineers, coordinate multidisciplinary studies, manage technical contracts, and communicate complex engineering findings to stakeholders.

Important: Ensure that your CV accurately reflects your experience, especially your reservoir engineering work in an operating company. Use clear examples of your responsibilities and achievements rather than listing technical skills without context.

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Before applying, make sure your CV is professionally presented and tailored to the role.

Use the DDBRACT CV Optimization Tool to improve your CV and present your skills and experience more effectively.

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